I can't help you out with the cluster hookup, but I can give a tip on affordable touch-screen nav head units -
Any of the Pioneer head units that support their "AppRadio Live" phone app will use the voice recognition, GPS, and other features of your (supported) phone, using the screen of the head unit for display and control. It keep the cost down because you don't need to buy the external nav add-on unit for the stereo if you already have a iPhone, Android or maybe some other supported phone and you don't have to pay up to a higher head unit model to get voice recognition.
I scored one on eBay (NIB, Pioneer dealer) for under $400 and added the Mopar rear steering wheel control kit for another $130. For the $530 I paid it was a MASSIVE upgrade in media and nav features of my truck. Worth noting that it does not display the arrows for upcoming turns on the instrument gauge cluster (like a factory unit can) but only on the head unit/stereo.